Control system for elevators



Nov 22,, 1848 J. H. BORDEN 2,488,847

CONTROL SYSTEM FOR ELEVATORS Filed Nov. 7, 1948 2 Shets-Sheet 1 CA M3 CAR*1 INVENTOR. JUSE'FH HE/URUEN I BY @W AT'T'YS.

Nov. 22, 1949 J, BURDEN 2,488,847

CONTROL SYSTEM FOR ELEVATORS Filed NQV. '7, 1946 2 Sheets-Sheet 2 TIE-Lb .sefiV 5 97 96 K17 CAR CAR CAR #1 #2, #3

IN VEN TOR. JusEPH HBUHDE'N ATTYS.

Patented Nov. 22, 1949 UNITED- STATES PATENT OFFICE 2,488,847 CONTROL SYSTEM FOR ELEVATORS Joseph H. Borden, Toledo, Ohio, assignor toThe Haughton Elevator Company, Toledo, Ohio, a

corporation of Ohio Application-November 7, 1946, Serial No; 708,386

4. came. 1

This invention relates to anassignment or con:

trol system for a plurality'ot elevators by which.

plicable to a bank of elevators where each is pro'- vided with a completeselective-collective control system, such asis'e'm'ployed by an automatic single elevator, and by which a hall push button at any floor may be employed to summon a car for service in-the'upor down direction, as desired.

In a patent for Control for automatic ele vators, No.- 2,217,824, granted October 15, 1940, to Ernest B. Thurston thereis disclosed an arrangement whereby calls from a number of hall buttons'at a time can bereass'ign'ed from one ele vator to another, but where suchassignment must be in fiir'ed'sets'of floorsthis does not permit the flexibility sometimes desired.

By the present invention the hall push button for either the up or down direction at any floor may be assigned at will to'any one of a plurality of elevator cars without affecting the operation of other elevators in the bank, and this result is, obtained in a simple manner. The details and minor objects of the invention will appear as the description proceeds.

v In the accompanying drawings forming a part of this specificatiom'Fi'g'. 1 is a wiring diagram-- showing the principle of the control system; Fig. 2 is a diagrammatic'view of a control board for the system shown in Fig.1; Fig. 3 is a plan view of a set of interlocked" assignment switches employed in the control: system; and Figs.- 4 and 5 sections on the lines 4-4 and'E- B, respe'z'stively', on Fig. 3. 7

In Fig. 1 there is shown anarran'gement of switches and connections suitable for the assignment of three elevators to selected floors: in a four-story building. For convenience, the dare, not shown,- willbe referred-teas car I, car 2 and car 3.

At the upper left of the diagram there is indicated a power line I0 connected by branches to push button switches II, I2 and I3 which represent the call switches for the down direction at floors 2, 3 and 4, respectively. Switch II', when closed, connects line In with line I4 which leads to interlocked assignment switches I5, I6 and Il, only one of which can be closed at a time. Switch I5, when closed, connects line I4 with line I8 which in turn leads to a relay coil I9, the other end of which is connected to power line 20. The relay l9 forwards the down call at floor 2 to car I, in a well known manner.

similarly, switch I6, when closed, connects line I4 with line 2| leading to relay coil 22, the other end of which is connected to line 26. Relay 2;!"

forwards the down call at floor 2 to car 2. Switeh I'I, when closed, connects line I4 to line 23 leading" to relay coil 24, likewise connected to line 20 and forwarding the down call at floor 2 to car 3.

In a similar manner, switch I2 is connected by" line 25 to interlocked switches 26, 21' and 28,.and' these when closed connect line 25 through lines 29, 36 and M to relay coils 32, 33 and 34', respec tively, which forward to cars I, 2 or 3,respectively, the down call at floor 3.

Likewise, switch I3 connects line" II) to line '35 leading to switches 36, 31 and 38 which connect respectively to lines 39; 46 and 4| leading't'o relay coils 42; and 44 which forward down calls from floor 4 to cars I, 2' or 3, respectively.

Line Illalso leads'to hall switches 45, 46 and: 41 which are the call switches for the up direction atfioors I, 2 and 3, re'spectively'. Switch 45 con nests line I6 to line as leading to switches 49; 5a

and 5| which connect respectively to lines 52, 53

and 54 leading to relays 55, 56 and 51 which'forward up" calls atfloor I to cars I, 2 or 3, respec tively. Switch 46 connects line I0 with line 58 leading to switches 59, 66' and 6| connecting re'-* spectively to lines 62, 63 and 64- leading to relays" 65, 66 and 67' forwarding up calls at floor 2 teens I, 2 or 3 respectively. Switch 41' connects with line 68 leading to switches 69, Ill and ll which connect respectively with lines I2, 73 and 14 leading to relays I5, I6 and I! which forward up calls at floor 3 to'car I, 2 or 3, respectively.

It will be understood that normally each set of" 3 of the control switches is interlocked so that' biit' oneswitc'h of eachset can be closed at any one time. Figs. 3 to 5, inclusive, show one typical arrangement by which this may be accomplished; A switchboard 86 is perforated to receive push buttons BI, 82 and 83 for operating switches I5; I6 and I 1, respectively. Each button is mounted on a stem 84 slidable through a casing 85. Near each end of the casing there is a fixed pin 86, and equally spaced between these are two pins 81 slidable in slots 88 in the casing. Toggle links 89 connect adjacent pins 86 and 81 to pins 96 working in transverse slots 9| in stems 84.

Each button is provided with a flange 92 between which and casing there is a spring 93. At the inner end of each stem there is a slidable contact plate 94, which is pressed inward from pin 95 or other abutment fixed on the stem, by a spring 96 against a flange 91 on the end of the stem.

It will be seen that, with button 8| pushed line I 6' I in, as indicated in Fig. 3, buttons 82 and 83 are held in their outer positions by the straightening of their connecting toggles. Also, because of these straightened toggles and fixed pin 86, springs 93 and 96 cannot force button 8i outward. However, inward movement of button 82 or 83 allows the straightening of the toggle connected to button SI, and locks in place the button pushed in until one of the other buttons is pushed. Therefore, when any one of the switches of the set is closed, all others in that set are automatically opened, and the switches remain reliably as set until intentionally changed.

It will be seen that a compact set of the assignment switches may be mounted in a control board where the starter can readily determine which car is to serve each floor in each direction. Fig. 2 indicates such a control board for an arrangement like that of Fig. 1, the push buttons on the board being given the same reference numerals as the respective switches on Fig. 1.

For simplicity in disclosing the principle of the invention, the showing has been confined to a combination where there are three cars serving four floors, but obviously the arrangement may be applied to two or any greater number of cars and as many floors as desired.

Where such service is desired, the cars may be made to return automatically to the first floor, and then no call buttons to that floor will be necessary.

It will be readily understood that the relays for forwarding calls may be arranged to operate in any old or well known manner to light indicating lights or perform other operations, the control system operating merely to assign the action of any button at any landing to the desired one of a plurality of elevators, the other details of the selective-collective control system not being changed by this additional control.

'One form of interlock for switches has been shown in some detail, but it will be understood that other known interlocking means may be employed insuring that the closing of one of a set of switches will open the other switches of the set, and other details of the arrangement may accord with known constructions without varying the principle of the present invention as defined in the appended claims.

What I claim is:

1. In a combination comprising a plurality of elevators serving a plurality of landings by selective collective automatic operation, a directional call switch at a landing, a set of assignment switches, comprising a switch for each elevator, all of the switches of a set being connected on one side to the call switch and each assignment switch being connected on its other side to its respective elevator whereby a call from the call 4 switch is forwarded to that elevator whose assignment switch is closed.

2. In a combination comprisin a plurality of elevators serving a plurality of landings by selective collective automatic operation, a directional call switch at a landing, a set of assignment switches, comprising an assignment switch for each elevator, all of the assignment switches of a set being connected on one side to the call switch and each assignment switch being con nected on its other side to its respective elevator whereby a call from the call switch is forwarded to that elevator whose assignment switch is closed, and interlocking means for the assignment switches maintaining all other switches of the set open when one switch of the set is closed.

3. In a combination comprising a plurality of elevators serving a plurality of landings by selective collective operation, a directional call switch at each of a plurality of landings, a plurality of sets of assignment switches, one set for each call switch, each set comprising a separate switch for each elevator, one side of all the switches in a set being connected to that sets respective call switch and the other side of each assignment switch being connected with its respective elevator, whereby the call from any call switch is forwarded to an elevator when, and only when, that elevators respective assignment switch is closed in the set of control switches connected to the respective call switch.

4. In a combination comprising a plurality of elevators serving a plurality of landings by selective collective operation, a directional call switch at each of a plurality of landings, a plurality of sets of assignment switches, one set for each call switch, each set comprising a separate switch for each elevator, one side of all the switches in a set being connected to that sets respective call switch and the other side of each assignment switch being connected with its respective elevator, whereby the call from any call switch is forwarded to an elevator when, and only when, that elevators respective assignment switch is closed in the set of assignment switches connected to the respective call switch, the switches of each set being interlocked so that as long as one switch of that set is closed all other switches of that set are open.

JOSEPH H. BORDEN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,274,301 McNabb July 30, 1918 2,075,102 Eames et a1 Mar. 30, 1937 2,088,463 Carney et al July 27, 1937 

